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ASPDAC
2008
ACM

DPlace2.0: A stable and efficient analytical placement based on diffusion

8 years 10 months ago
DPlace2.0: A stable and efficient analytical placement based on diffusion
Nowadays a placement problem often involves multi-million objects and excessive fixed blockages. We present a new global placement algorithm that scales well to the modern large-scale circuit placement problems. We simulate the natural diffusion process to spread cells smoothly over the placement region, and use both analytical and discrete techniques to improve the wire length. Although any analytical wire length technique can be used in our new framework, by using the quadratic wire length model, the hessian of our formulation is extremely sparse compared with conventional formulations, which brings 24x speed up on quadratic solver. We also propose a wire linearization technique that transform quadratic star model into HPWL exactly. The overall runtime of our tool is close to the fastest placement tool in existing literature and significantly better than others. And meanwhile, we obtain competitive wire length results to the best known ones. The average total wire length is 2.2% hig...
Tao Luo, David Z. Pan
Added 12 Oct 2010
Updated 12 Oct 2010
Type Conference
Year 2008
Where ASPDAC
Authors Tao Luo, David Z. Pan
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